Brush chopping machine



D. R. GARRETsoN 2,537,404

BRUSH CHOPPING MACHINE Jan. 9, 1951 Filed Deo. 1, 1945 6 Sheets-Sheet lD. R. GARRETSON BRUSH CHOPPING MACHINE Jan. 9, 1951 6 Sheets-Sheet 2Filed DeG. 1, 1945 {NI/ENTOR. BYO ws P. @mea-754W W f m Qatar/M95 Jam 9,1951 D. R. GARRETSON 2,537,404

BRUSH cHoPPING MACHINE y Filed Dec. l, 1945 6 Sheets-Sheet 5 IN V ENTOR.

A W5 P. @maarja/v BY Jan. 9, 1951 D. R. GARRETsoN 2,537,404

BRUSH cHoPPING MACHINE Filed Dec. l. 1945 6 Shecs-Shee'fI 4 IN V EN TOR.

Jan' 9, 1951 D. R. GARRETSON 2,537,404

BRUSH CHOPPING MACHINE Filed Deo. l, 1945 6 Sheets-Sheet 5 IN VEN TOR./u//j @Leef 15a/v Jan. 9, 1951 D. R. GARRETSON 2,537,404

BRUSH CHOPPING MACHINE Filed Dec. l, 1945 v6 Sheets-Sheet 6 PatentedJan. 9, 1951 UNITED STATES PATENT OEFICE 18 Claims.

This invention relates to a brush handling machine orbrush hog.

A primary object of the invention is to provide a machine in the form ofa movable vehicle which has a collared ribbon hogging cylinder orhogging means, and which has power-driven means for picking up ordragging brush and the like and feeding it to the hogging means so as tobe cut up into relatively small pieces. e

The invention has been primarily devised for handling prunings in citrusgroves, and consequently will be described as used therein although itmay be employed wherever it is desired to cut up or finely divide brushor other vegetable matter.

In citrus groves, particularly lemon groves, the trees are periodicallypruned and the prunings which may be `relatively heavy branches haveheretofore been dried and ultimately burned as a means of disposing ofthem. The present invention provides a machine for cutting up suchprunings into small fragments and redepositing these fragments on thesoil between the trees. This covering layer which is woody in natureprovides an excellent mulch when allowed to remain on the surface and ifdisced under it will shortly rot and contribute humus to the soil. Inaccordance with the present invention it is proposed to deposit theprunings from the citrus trees in windrows between the rows of trees andthereafter to run the machine down the windrows, pick up the brush, andgrind it or cut it into relatively small fragments which are redepositedon the ground.

More specifically, an object of the invention is to provide a brushhandling machine consisting of a vehicle on which a hogging means isprovided and to provide a novel means for picking up the brush andfeeding it to the hogging means. Inasmuch as the prunings or branchesare f every conceivable irregular shape, the feeding means must be sodesigned as to pick up the brush regardless of the limb shapes urge thebrush into engagement with the hogging means.

With the foregoing and other objects in view, which will be mademanifest in the following detailed description and specifically pointedout in the appended claims, reference is had to the accompanyingdrawings for an illustrative embodiment of the invention, wherein:

Figure 1 is a perspective view of the front of the machine embodying thepresent invention;

Fig. 2 is a view in side elevation of the same;

Fig. 3 is a perspective view of the machine illustrated in Fig. 1, buttaken from a different point of view;

Fig. 4 is a vertical section through the apron forming a part of themachine and taken substantially upon the line 4--4 upon Fig. 3;

Fig. 5 is a View partly in elevation and partly in section, thesectional part thereof being taken substantially upon the line 5-5 uponFig. 4;

Fig. 6 is a view taken substantially upon the line 6 6 upon Fig. 4; ,A

Fig. 7 is a view in elevation of the hogging cylinder forming a part ofthe machine embodying the present invention;

Fig. 8 is a longitudinal vertical section through the machine butillustrating only one of the pivoted arms thereof which carries largefeeding teeth and illustrating the various positions it assumes indotted lines; 4

Fig. 9 is a partial view in side elevation illustrating the details ofconstruction of one of the arms;

Fig. 10 is a sectional view taken substantially upon the line lli- I0upon Fig. 8;

Fig. 11 is an enlarged view in vertical section illustrating the lowerportion of the hogging cylinder and associated structure and may beregarded as having been taken substantially upon the line lI-Il uponFig. '7;

Fig. 12 is a top plan view of the transmission and associated structureforming a part of the machine; and

Fig. 13 is a view taken substantially upon the line I3'-l3 upon Fig. 12.

Referring to the accompanying drawings wherein similar referencecharacters designate similar parts throughout, the machine embodying thepresent invention is carried on a suitable vehicle, such as for examplea truck, the chassis of which is indicated at l0 and having rear wheelsIlla. The truck may be of any preferred or conventional construction andin the course of operation of the machine it is intended to be driven inreverse between rows of trees in following a windrow of brush orprunings deposited therebetween. As these windrows are usually formedbetween straight rows of trees the windrows themselves will normally berelatively straight so that there is little occasion to steer the truckin following the straight windrow although steering by the front wheels(not shown). of the truck is of course possible. The truck may beadvantageously used to transport the entire machine from place to placein the conventional manner and as the progress of the machine infollowing the windrow of brush is relatively slow the low gearing of thenormal reverse gear in a truck transmission is not objectionable.

. On the chassis l0 there is provided a suitable 3 source of power suchas an internal combustion engine indicated at l5. On the drive shaft ofthe internal combustion engine there are a series of pulleys I2 for Vbelts or the equivalent indicated at I3 that provide a direct drivebetween the internal combustion engine H and the lumber hogging cylinderI4. This hogging cylinder is mountedv on a suitable axle I5 on whichthere are pulleys t6 over which the belts l3 are.l trained, a belttightener being indicated at l1 for keeping these belts suitably tight.

The hogging cylinder extends a substantial distance across the width ofthe chassis of theI truck and is relatively heavy. I nd it suitable formy purposes to employ a hogging cylinder weighing approximately 250Glbs. and` rotated at aspeed: ofl approximately 775 R; P. M. On thehogging cylinder at spaced intervals there are pockets within whichknives or blades i8 are adjustably secured by means of cap screws I9 andblade `platesY 2l). These blades project beyond the cylindrical surfaceof the body of the cylinder a short distance, see Fig. ll, depending onthe degree of fi'eness to which it is desired to cut up the brush.During the rotation of the hogging cylinder` the blades i8 sweepadjacent the stationary blade 2| that is adjustable by means of capscrews 22 and in'- the preferred form of construction there is a Ysecond stationary blade 23 that is likewise adjustable. These blades'extend transversely of the truck the entire length of the hoggingcylinder and the brush to be cut up is fed in a direction between therotating cylinder and the stationary blade 2l across the apron that isgenerally designated at 24. On the opposite end of the hogging cylinderfrom pulleys i6 there are additional pulleys 25 which are part of a belttransmission 26 to a transversely extending shaft 2l. On this shaftthere is a clutch 28, see Fig. 12, operable by linkage 29 and aspeed-change transmission 36 which delivers power taken off of thehugging cylinder at variable speeds to a shaft 3| having a gear 32 thatmeshes with a gear 33 on a stub shaft that carries a chain sprocket 34.A chain 35 is trained over this sprocket and over a spr`ock et 36 on astub shaft 31 and on this stub shaft there is a second sprocket overwhich is trained a chain 38 that leads downwardly to a sprocket 39 whichis on the end of a shaft 49 extending across the rear or inner end ofthe apron 241. On this shaft 4t) there is mounted a corrugated roller 4lthat is located rather close to the sta-e tionary blade of the huggingmeans, see Fig. 11. This corrugated roller is driven in such a Inan-Vner as to urge material brought in over the apron toward the stationaryblade 2l and into the path of the blades I8 on the hugging cylinder. Onthe opposite end of shaft 4G from sprocket 39 there is a sprocket overwhich is trained a chain 42 so as to provide a driving connectionbetween the co1 rugated cylinder 4I and a rotary cylinder 43 that isrotatably mounted at the forward end of the apron. Within the rotarycylinder 43 there is a rotary shaft 44 that is mounted for rotationabout an axis that is eccentric with respect to the axis of rotation ofthe cylinder 43, and this shaft carries a series of radially extendingteeth 45 that extend through slots 46 in the cylinder; The arrangementof the shat with respect to the cylinder 43 is such that when the teethon the shaft 44 are lowermost and in a position similar to thatillustrated in Fig. 4, that the teeth project considerably through theslots 43 in the cylinder. During rotation of the cylinder and shafttheteeth are retracted as indicated by dotted lines on Fig. 4, so that ineiect these teeth project from the cylinder on its underside but on itsupper side they are retracted therein. These teeth are driven in thedirection of the arrow as illustrated on Fig. 4, and tend to pick upbrush and twigs lying on the ground and deposit them on the apron 24.inasmuch as these teeth sweep very closely to the ground the extendingand retractlng action of the teeth with relation to the cylinder ishighly advantageous in that each retraction of the teeth through theslots 46 tends to clean them and at the same time they are caused to bewithdrawn and to disengage and thus release the brush deposited on theapron. The apron is adjustable with respect to the ground by means ofhangers 46 that are pivotally connected thereto and to cranks 4l thatare pivotally mounted on the frame 43. The cranks 41 are, in turn,connected by linkages 49 to an adjustable lever 5t that traverses aquadrant 5l. By adjusting lever 59 with relation to the quadrant theapron may be adjusted about the axis of shaft 4o as acenter. Tensionsprings 52 may be secured to the frame 48 and to the tops of the hangers46 to assist in carrying the load of the apron in any adjusted position.At the sides of the apron there are mounted wings 53 which convergerearwardly or toward the hogging cylinder and tend to guide the brush asit is drawn across the apron toward the center of the apron andv in aposition to be engaged by hogging cylinder.

On the shaft 3i there is provided a sprocket 54 over which is trained anendless chain 55. This chain in turn drives a sprocket 56 on a shaft 51extending across the chassis of the vehicle and which has cranks 5S atthe ends. Pitmans '59 are pivotally connected to these cranks and havetheir lower ends slidably extending through pivoted collars Gil on crankarms Si' o-n a transversely extending shaft 52. This shaft, in turn, haspairs of crank arms 63 rigidly secured thereto whichl extendA downwardlyagainst opposite sides of tampers or packers G4 and are pivotallysecured thereto as at 65 adjacent their rear ends. The forward ends ofthese packers or tampers are pivotally suspended by means of links 66from arms 61 on the frame. The packers or tampers are inthe form ofsteel plate sections that extend downwardly and rearwardly and whichpresent downwardly and rearwardly inclined teeth`- 58. At theirextremities they are provided with extensions 69 that press the brushrather closely against the hugging cylinder. Compression springs 10surround the pitmans and are compressed between pins 1l and the collars66, thus forming a yieldable connection between the cranks 58 and thecranks 6i.

During rotation oi the shaft 3l siaft 51 will be driven at a reducedspeed and the cranks 8 will in turn operate the pitinans t causing theshaft 62 to be oscillated. The cranks 63 will causel the packers ortampers to bel reciprocated in a somewhat oscillatory manner and causethe teeth 68 and extensions ed to engage the brush and advance it towardthe hogging cylinder with a step-by-step motion. The packers or tampersthat thus advance the brush toward the hugging cylinder operate inunison and serve to crowd the brush downwardly against the apron andinto engagement with the corrugated roll lli and to cooperate therewithin feeding the brush against the hogging cylinder.

The shaft 5l carries a small sprocket i3 and an endless chain 14provides a driving connection between this shaft and a sprocket 'l5mounted on a crankshaft 16. This crankshaft preferably has four throws,that is its crank pins are circumferentially spaced 90 apart. Thecrankshaft is suitably mounted for rotation on bearings 11 on armssecured to the frame. On the crank pins there are provided bearings 18that are secured to the undersides of arms 19. Each arm is preferablymade up of two spaced plates between the outer ends of which there arerigidly secured long downwardly extending teeth 80. Somewhat rearwardlyof these teeth there are pivotally secured additional teeth 8| thepivots therefor being provided at 82. Tension springs 83 are secured tothe upper ends of these teeth and connect them with the outer or forwardends of the arms on which they are mounted. These tension springs urgethe teeth 8| into the fullline position shown in Fig. 9, against stops84. However, if the brush accumulates excessively behind the teeth 8|these teeth may swing into the dotted line position as shown in Fig. 9.It

is ordinarily not necessary to make the teeth 80 yieldable due to thefact that these teeth are so remote from the hogging cylinder. However,as the brush is drawn toward the hogging cylinder it is advisable tohave the teeth 8| yieldable and the packers or tampers yieldable as isprovided by the springs so that these teeth and packers may give whenthe brush crowds too heavily against the hogging cylinder. The rear endsof the arms 19 are provided with spacers 85 through which extend bolts86 on which are mounted rollers 81, these rollers being retained on thebolts by Washers 818 and nuts 89. Guides or cams 90 are rigidly securedto the frame and have slots 9| formed therein in which the rollers 81are disposed. These guides or cams serve to guide the motions of therearward ends `of the arms 19 while the arms are being actuated with therotary crankshaft 16. It will be noted that these slots 9| are curved asillustrated so as to bring about a rather peculiar motion of the arms 19and the teeth 80 and 8| thereon. In other words, as the crankshaftrotates each arm will be caused to be lifted by its crank pin on thecrankshaft, then carried upwardly and forwardly and during this forwardmotion the rollers 81 merely roll down the inclined forwardmost portionsof the slots 9|. As the crank pin continues its rotation the -arms arelowered in this extended position causing the teeth 8D and 8| to descendinto the brush of the windrow. During the forward motion of the crankpin the teeth are brought forwardly to pass the brush onto the apron andto deliver it into a position to be picked up and advanced by thetampers or packers. The curvature of the slots 9| guide the motion ofthe rear ends of the arms sov that as the arms are lifted by thecrankshaft they will be withdrawn clear of the delivered brush. As thecrank pins on the crankshaft are circumferentially spaced, the arms maybe regarded as operating in sequence. In other words, while one pair ofteeth 80 and 8| on one arm is descending into the brush of the windrow,another arm and its teeth may be drawing brush rearwardly onto theapron. A third arm and its teeth may be simultaneously lifted from thedelivered brush and a fourth arm and its teeth may be undergoing theoperation of being extended forwardly to pick up a new load. In thismanner, brush is being constantly picked up and drawn rearwardly by theteeth 80 and 8| on the various arms Vand drawn onto the apron where itsrearward movement is picked up and advanced by the packers or tampers64, and the corrugated roller 4|. At the same time brush lying close tothe ground is being picked up by the continuously rotating teeth 45 andlifted onto the apron. `The elevation of these teeth with respect to theground surface can at all times be adjusted by means of the lever 5|).The relative speeds of the various shafts is such that the teeth 45rotate fairly rapidly and the packers and tampers 5d are reciprocatedfairly rapidly. There is a considerable speed reduction between theshaft 3| and the crankshaft 1S so that the teeth and 8| move throughtheir cycles of movement rather slowly in picking up and dragging thebrush onto the apron, As the brush is brought in contact with thehogging cylinder the vcuttings in the form of chips or slivers are dis-'charged rearwardly underneath the vehicle and will normally be scatteredthereby over the surface of the ground. If allowed to remain on thesurface they form a moisture-retaining mulch and if disced or plowedunder, these chips and cuttings as well as the leaves quickly rot and`contribute humus to the soil. Y

In the course of operation of the machine I find it advantageous todisengage the clutch 28 and to hold the same disengaged until the heavyhogging cylinder has been brought up to speed so that a heavy startingload is not placed on the internal combustion engine After the hoggingcylinder has been brought up to speed it functions not only as a hoggingcylinder but fas a heavy flywheel at the time that the 'clutch isengaged to start the various mechanism driven olf of shaft 3|. The speedof operation of the various elements of the machine that contribute tofeeding the brush to the hogging cylinder may be Varied by thespeed-change transmission 3|) in accordance with how heavy the brush maybe in the windrow. Y

While it is preferable to arrange the brush or prunings in a windrow inan orchard or grove lt will readily be appreciated that the presentmachine may be utilized with Vbrush in other conditions. It may beemployed where the brush is merely scattered or where brush is piled ina single large pile or a plurality of scattered piles; When the brush isarranged in a windrow the vehicle can ordinarily be moved continuouslyand slowly down the length of the windrow and the chips or cuttingsevenly scattered as the vehicle proceeds.

Various changes may be made in the details of construction withoutdeparting from the spirit and scope of the invention as dened by the ap#pended claims.

I claim:

1. A device of the class described comprising a vehicle having a hoggingcylinder rotatably mounted thereon, a stationary blade adjacent thecylinder, means for rotating the cylinder, an apron adjacent thestationary blade, means for drawing brush and the like onto the apron soas to be hogged by the hogging cylinder including arms having downwardlyextending teeth thereon, at least some of the teeth being pivoted to thearms and movable from an outer to an inner position, means urging thepivoted teeth into their inward position, and means for causing saidarms to be lifted, extended outwardly beyond the apron, lowered, andthen be drawn inwardly over the apron.

2. A device of the class described comprising a vehicle having a hoggingcylinder rotatably mounted thereon, a stationary blade adjacent thebottom of the cylinder, means for rotating the cylinden, an apronadjacent the stationary blade, means for drawing brush and the like ontothe apron so as to be hogged by the hogging cylinder. including armshaving downwardly extending teeth thereon, a crankshaft on the vehicleon which the arms are pivotally mounted, means for rotating thecrankshaft, and guide means on the vehicle for the inner ends of thearms constraining the arms to move in a predetermined path of travelirrespective of the upward force on. the arms whereby the arms onrotation of the crankshaft will bev lifted, extended outwardly from thehogging cylinder, lowered, and drawninward- 1y toward the hoggingcylinder.

3. A device of the class described comprising a vehicle, hogging meansthereon, a crankshaft on the vehicle having a plurality of throws, armspivotally mounted thereon adjacent their outer ends, guide means on thevehicle for the inner ends of the arms, means for rotating thecrankshaft, and downwardly extending teeth on the outer ends of the armsadapted to be lifted thereby, extended, lowered, and drawn inwardlytoward the hugging means.

4. A device of the class described comprising a vehicle, hugging meansthereon, a crankshaft on the vehicle having a plurality of throws, armspivotally mounted thereon adjacent their outer ends, guide means for theinner ends of the arms, means for rotating the crankshaft, anddownwardly extending teeth on the outer ends of the arms adapted to belifted thereby, extended, lowered, and drawn inwardly toward the hoggingmeans, andan apron extending forwardly from the hogging means over whichthe teeth are drawn.

5. A device of the classr described comprising a vehicle, hogging meansthereon, a crankshaft on the vehicle, arms pivotally mounted thereonadjacent their outer ends, guiding means on the vehicle, means on theinner ends of the arms guided by the guiding means, means for rotatingthe crankshaft, and downwardly extending teeth on the outer ends of thearms adapted to be lifted thereby, extended, lowered, and drawn inwardlytoward. the hogging means, an` apron extending forward-ly from thehogging means over which' the teeth are drawn, and means for adjustingthe inclination of the apron.`

6.` A device. of the class described comprising a vehicle, hogging meansthereon, a crankshaft on the vehicle, arms pivotally mounted thereon,guide means on the vehicle for the inner ends of the arms, means forrotating the crankshaft, and downwardly extending teeth on the outer.ends of the arms adapted to be lifted thereby, extended, lowered, anddrawn inwardly toward the hogging means, an apron extending forwardlyfrom the hogging means over which the teeth are drawn, said apron havinga corrugated cylinder adjacent the hogging means positioned so that thelongitudinal axis of the cylinder is below the top surface of the apron,and means for rotating said corrugated cylinder in a direction tocooperate with the teeth in feeding material to the hogging means.

'7. A device of the class described comprising a vehicle, hogging meansthereon, a crankshaft on the vehicle, arms pivotally mounted thereon,guide means on the vehicle for the inner ends of the arms, means forrotating the crankshaft, and downwardly extending teeth on the outerends of the arms adapted to be lifted thereby, extended, lowered, anddrawn inwardly toward the Vhogging means, an apron extending forward.-ly from the: hoggl'llg means over which the teeth aredrawn, said apronhaving at the outer end thereof a rotary cylinder, and teeth rotatablewithin and with said cylinder about an axis eccentric thereto so thatthe teeth will be drawn into the cylinder when disposed uppermost andproject therefrom when disposed lowermost, and means for rotating saidcylinder and teeth in a direction to cooperate with the mst-mentionedteeth in feeding material across the apron to the hogging means.

8. A device of the class described comprising a vehicle, hogging meansthereon, a crankshaft on the vehice, arms pivotally mounted thereon,guide means on the vehicle for the inner ends of the arms, means forrotating the crankshaft, and downwardly extending teeth on the outerends of the arms adapted to be lifted thereby, extended, lowered, anddrawn inwardly toward the hogging means, and packers mounted foroscillation between the teeth and adjacent said hogging means, and meansfor oscillating said packers to cause them to pick up material broughttoward the hogging means by said teeth. and pack toward the hoggingmeans.

9*. A device of the class described comprising a vehicle, hogging meansthereon, a crankshaft on the vehicle, arms pivotally mounted thereon,guide means for the inner ends of the arms,

ieans for rotating the crankshaft', and downwardly extending teeth onthe outer ends of the arms adapted to be lifted thereby, extended,lowered, and drawn inwardly toward the hogging means,r and packersmounted for oscillation between the teeth and adjacent said hoggingmeans, and means for oscillating said packers to cause them to pick upmaterial brought toward the hogging means by said teeth and pack ittoward the begging means, said last named means being yieldable.

10. A device of the class described comprising a vehicle having ahogging cylinder, means for rotating the hogging cylinder, an apronadjacent the. hugging cylinder, a stationary blade adjacent which thehogging cylinder rotates, a corrugated roller on the apron adjacent thesta.- tionary blade, rotary means at the outer end of the apron forbeating material onto the apron, means for rotating said corrugatedcylinder, and said rotary means, arms carrying teeth above the apron,means for lifting said arms, extending them, lowering them, and drawingthem inwardly toward thel apron, and packers arranged above the apron,and means for reciprocating said packers.

11. In a brush hog or the like, hogging means, and means for feedingbrush and the like toward the hogging means including a crankshaft hav'-ing a plurality of throws, arms pivotally mounted on the crankshaft,teeth on the outer ends of said arms, means for guiding the inner endsof said arms, means for rotating the crankshaft, at least some of theteeth being pivoted to the arms and movable from an outer to an innerposition, and means for urging the pivoted teeth into their inwardposition.

12. In a brush log or the like, a vehicle, a hogging cylinder mountedfor rotation thereon, a stationary blade adjacent the hugging cylinder,means for rotating the hogging cylinder, a plurality of packers adjacentthe hogging cylinder, links suspending the outer ends of the packers, arockshaft adjacent the inner ends of the pack- Z5 ers, means connectingthe inner ends of the pack- 9 ers to the rockshaft, and means foroscillating the rockshaft.

13. In a brush hog or the like, a, vehicle, a hoggingcylinder mountedfor rotation thereon, a stationary blade adjacent the hogging cylinder,means for rotating the hogging cylinder, a plurality of packers adjacentthe hogging cylinder, links suspending the outer ends of the packers, arockshaft adjacent the inner ends of the packers, means connecting theinner ends of the packers to the rockshaft, and means for oscillatingthe rockshaft, said packers having teeth directed toward the hoggingcylinder on the lower edges thereof.

14. A device of the class described comprising a vehicle having ahogging cylinder rotatably mounted thereon, a stationary blade adjacentthe cylinder, means for rotating the cylinder, an apron adjacent thestationary blade, means for drawing brush and the like onto the apron soas to be hogged by the hogging cylinder including arms having downwardlyextending teeth thereon, a crankshaft on which the arms are pivotallymounted, means for rotating the crankshaft, and guide means for theinne1` ends of the arms, particular portion-s of the ends of said armsbeing constrained to ride continuously within the guide means whereby onrotation of the crankshaft the teeth will be lifted, extended outwardlyfrom the hogging cylinder, lowered, and drawn inwardly toward thehogging cylinder.

15. A device of the class described comprising a vehicle, hogging meansthereon, a crankshaft on the vehicle having a plurality of throws, armspivotally mounted thereon adjacent their outer ends, guide means on thevehicle for the inner ends of the arms, means for rotating thecrankshaft, downwardly extending teeth on the outer ends of the armsadapted to be lifted thereby, extended, lowered, and drawn inwardlytoward the hogging means, at least some of the teeth being pivoted tothe arms and movable from an outer to an inner position, and meansurging the pivoted teeth into their inward position.

16. A device of the class described comprising a vehicle, hogging meansthereon, a crankshaft on the vehicle having a plurality of throws, armspivotally mounted thereon adjacent their outer ends, guide means on thevehicle for the inner ends of the arms, means for rotating thecrankshaft, and downwardly extending teeth on the outer ends of the armsadapted to be lifted thereby, extended, lowered, and drawn inwardlymounted thereon, a stationary blade adjacent the bottom of the cylinder,means for rotating the cylinder, an apron adjacent the stationary blade,means for drawing brush and the like onto the apron so as to be hoggedby the hogging cylinder, including arms, a crankshaft on which the armsare pivotally mounted, means for rotating the crankshaft, downwardlyextending teeth on the arms, at least some of the teeth being pivoted tothe arms and movable from an outer to an inner position, means urgingthe pivoted teeth into their inner position, and guide means for theinner ends of the arms constraining the arms to move in a predeterminedpath of travel irtoward the hogging means, at least some of therespective of upward forces on the arms whereby the teeth on rotation ofthe crankshaft will be lifted, extended outwardly from the hoggingcylinder, lowered and drawn inwardly toward the hogging cylinder. Y 18.A device of the class described comprising a vehicle, cutters forcutting brush or the like, a crankshaft rotatably mounted on thevehicle, arms pivotally mounted on the crankshaft adjacent their outerends, guides on the vehicle operatively connected to the inne` ends ofthe arms for guiding the inner ends of the arms, downwardly extendingteeth on the outer ends of the arms, a motor operatively connected tothe cutters and the crankshaft for operating the cutters and forrotating the crankshaft to thereby lift the teeth, extend the teethoutwardly, lower the teeth and draw the teeth inwardly toward thecutters, an apron on the Vehicle extending forwardly from the cuttersover which the teeth are drawn, and packers mounted for oscillatingmovement on the vehicle above the apron and adjacent the cutters, thepackers being operatively connected to the motor to be oscillatedthereby to pack material toward the cutters.

DAVIS R. GARRETSON.

REFERENCES CITED rlhe following references are of record in the 111e ofthis patent:

UNITED STATES PATENTS Number Name Date Re. 2,192 Craven et al. Mar. 13,1866 1,053,467 Allen Feb. 18, 1913 1,081,201 Blunck Dec. 9, 19131,105,006 ySpencer July 28, 1914 1,200,937 Hannaford Oct. 10, 19161,593,952 Ribbans July 27, 1926 1,786,226 Bradley Dec. 23, 19302,394,996 Hill et al. Feb. 19, 1946 2,439,259 McCormack Apr. 6, 1948FOREIGN PATENTS Number Country Date 25,373 Norway Mar. 18, 1914

